jQuery Grid Plugin - jqGrid

I have a master detail setup. Works fine passing the id.  But in addition to passing the ID, I want to pass another field from the master table row into the query for the detail grid.

Using the example provdedI thought this would work. But just using the alert test to see what is returned - the machinename changes every time, but the resolution does not change. Any ideas? (using 3.2)

I set up master table and then...

, onSelectRow: function(ids) {
       
          var ret = jQuery("#masterGrid").getRowData(ids);
          var machine= ret.machineName;
          var resolution= ret.resolution;
  
         alert(resolution+" "+machineName);
         
          if(ids == null) {
            ids=0;
            if(jQuery("#detailGrid").getGridParam('records') >0 )
            {
              jQuery("#detailGrid").setGridParam({url:"get.php?resolution="+resolution+"&machine="+machine+"&q=5&id="+ids,page:1})
                .setCaption("Performance Detail: "+ids)
                .trigger('reloadGrid');
            }
          } else {
            jQuery("#detailGrid").setGridParam({url:"get.php?resolution="+resolution+"&machine"+machine+"&q=5&id="+ids,page:1})
              .setCaption("Performance Detail: "+ids)
              .trigger('reloadGrid');
          }
        }
        });